I definitely fit most of the stereotypes as a kid, but not so much today.
As a kid, I had a monotone, formal voice and definitely talked like a "little professor". I had very obvious special interests, which were often strange and very advanced for my years. For example, at the age of 3-4, I was interested in dinosaurs, knew all of their names, and had memorized concepts such as periods of time (cambrian, cretatious etc.) I was very, very nerdy.
I loved stuff in categories or series, and preferred very specific toys and books over others due to their membership in a series or some other specific aspect. I played by lining up and categorizing toys, as well as reading the same books over and over again. Today, while many of my interests still involve specific things, they are definitely not nearly as encompassing and intense as they were when I was a child....some I will only touch upon every few months. As well, I don't talk about them unless I think the person might be interested.
I had no theory of mind and had no idea how to behave around other people. I mainly interacted with people by collecting info from them related to my special interests. (like asking them where they got their bathing suits...I kid you not!) rather than play with them or engage in conversations. I now have friends and can engage in conversations well with other people, depending who they are.
I had obvious sensory issues, but I can only remember stimming at one time during my childhood (my hand freezing up and shaking). I never rocked or did any other repetitive motor mannerisms, other than constantly standing on my tiptoes to the point where it was obvious and people noticed. I didn't mind physical contact though...touch wasn't an issue, but temperature and smell were huge issues. I was also an extremely picky eater. I no longer have any of the above sensory issues today.
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Given a “tentative” diagnosis as a child as I needed services at school for what was later correctly discovered to be a major anxiety disorder.
This misdiagnosis caused me significant stress, which lessened upon finding out the truth about myself from my current and past long-term therapists - that I am an anxious and highly sensitive person but do not have an autism spectrum disorder.
My diagnoses - social anxiety disorder and obsessive-compulsive disorder.
I’m no longer involved with the ASD world.